Malicious PDF — malware analysis report

Static analysis result for SHA-256 2769acd9254abbe8…

MALICIOUS

PDF

69.6 KB Created: 2021-09-04 05:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 15e97996e926abe951d5554a65398258 SHA-1: 3f29c202347b3b9e173a0b23395be91cbc9f2b5e SHA-256: 2769acd9254abbe8439f0fdecf5904c394c1e2009d978e31c87489d7fc8ac0d2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous links to potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links likely serve to redirect users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://hamasataccessories.com/userfiles/files/78534046824.pdf In PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd00a2aaf7---kiwijizulisavafarez.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/pinigowazatu.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/zometinunewedotogo.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/ropafekakevegevepepene.pdfIn PDF document text
    • http://growourworld.com/clients/83159/File/meliwetiwamufamowugab.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/wonaximimekik.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/kuvilan.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/6768437365.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/17a6ba4d2f6311cce815bd4e9422f352/pewijetedatiwajekatulun.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094aee7906ea---zutudapuvema.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a5385339d---95592532768.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/lanoxud.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609d471dc332f---83104227321.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160838795d8457---45320394799.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e8404492c4ef6e118b3aa0440a5c21c1/tofovijunedeketasujimap.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4833a72b4---11131310753.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/lokedam.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbc922c7a0---rorokigobabe.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfed6bfc10---90931645939.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210511065930.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/69726756235.pdfIn PDF document text
    • http://email-database.info/userfiles/file/35303860508.pdfIn PDF document text
    • http://c-six.it/userfiles/files/1932057053.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/f27e52f678cab55a8080639a8507aaac/vuxokodakazomakexixamoni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=conjuguemos+grammar+worksheet+ser+vs+estar+%232+answer+keyPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/3ea340862efdc36f991ab364fd689bb5/susidogemewivo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB38B 13816 bytes
SHA-256: 54ad228d49f7bcf08fb8c41661fe862f4aa3ea395f8846687c1e3861256979d4
font_01_sfnt_off0000d5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A3 10924 bytes
SHA-256: 16bb67ec9595fd2f39b9ec604e9b49300b52890b1fe17bb3516cc064646985a0
font_02_sfnt_off0000eee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1